# Data protection and backups

> Transforming data with a key so unauthorized readers cannot interpret it.

Course: [Cybersecurity foundations](https://studybrix.com/en/courses/cybersecurity/index.md)
Level: university
Prerequisites: Basic computer and internet literacy.

## Notes

### Encryption

Transforming data with a key so unauthorized readers cannot interpret it.

### Backup

A separate recoverable copy of important data.

### Patch

An update that corrects defects or known security weaknesses.

### Data minimization

Collecting and retaining only data necessary for a defined purpose.

## Practice questions

### 1. Which term best matches this description: Transforming data with a key so unauthorized readers cannot interpret it.

A. Data minimization
B. Patch
C. Encryption
D. Backup

Answer: Encryption

Explanation: Encryption is the matching concept in this lesson.

### 2. Which term best matches this description: A separate recoverable copy of important data.

A. Data minimization
B. Patch
C. Encryption
D. Backup

Answer: Backup

Explanation: Backup is the matching concept in this lesson.

### 3. Which concept would you apply first in a situation where an update that corrects defects or known security weaknesses.

A. Encryption
B. Patch
C. Data minimization
D. Backup

Answer: Patch

Explanation: The scenario directly calls for Patch.

### 4. Name the concept described as: Collecting and retaining only data necessary for a defined purpose.

Answer: Data minimization

Explanation: The intended concept is Data minimization.

### 5. Which statement about Encryption is most accurate?

A. A separate recoverable copy of important data.
B. Transforming data with a key so unauthorized readers cannot interpret it.
C. An update that corrects defects or known security weaknesses.
D. Collecting and retaining only data necessary for a defined purpose.

Answer: Transforming data with a key so unauthorized readers cannot interpret it.

Explanation: The definition in the lesson notes gives the required condition.

### 6. Explain one important difference between Encryption and Backup.

Sample answer / marking guidance: Encryption: Transforming data with a key so unauthorized readers cannot interpret it. Backup: A separate recoverable copy of important data.

Explanation: Credit a clear distinction using both definitions and an appropriate example if supplied.

### 7. Give a short example showing how Patch would be used in practice.

Sample answer / marking guidance: A valid example should demonstrate this idea: An update that corrects defects or known security weaknesses.

Explanation: Credit a relevant scenario that applies the concept rather than merely naming it.

### 8. Summarize why Data minimization matters in the lesson “Data protection and backups”.

Sample answer / marking guidance: Data minimization matters because Collecting and retaining only data necessary for a defined purpose.

Explanation: Credit the core purpose, scope and any important limitation from the notes.

## Further reading

- https://www.nist.gov/cyberframework

Original AI-assisted educational draft; not independently teacher-reviewed. References support further study, not copied exercises, affiliation or curriculum accreditation.